I’m using ubuntu 14.04 on HP ProBook 4730s with AMD HD 6400m GPU.
I have some problems with proprietary\Opensource AMD driver in different games.
So i have to switch between drivers to play a particular game
I'm switching in System settings -> Software & Updates -> Additional Drivers
But for some reason its not changing any more. It says "1 Proprietary driver in use"
But it uses opensource driver

I tried to fully uninstall & install fglrx driver - no effect.aticonfig --initial says that no supported GPU found